Evaluation of cucumber germplam for mosaic resistance under mid-hill conditions of Himachal Pradesh

A naturally occurring mosaic disease of viral etiology has been reported in different cucumber growing areas of Himachal Pradesh. Preliminary studies on sap transmission and serological detection proved this mosaic disease to be a potyvirus. Hence the present investigation was carried out to screen the available germplasm for resistance against the virus isolate. Among 43 germplasms collected 12 were highly resistant to the disease with per cent disease incidence ranging from 1 to 5 whereas four moderately susceptible germplasms had disease incidence of 17–20 per cent.